2+2+2+2= say so for a friend

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?